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Based on Pontryagin maximum principle, the lunar soft landing problem is transformed into a two-point boundary value problem in mathematics. In consideration of the bound condition and transversality condition, the resulted two-point boundary value problem is converted into a parameter optimization problem aiming at the initial values of conjugate variables and the terminal time, then it is solved by the nonlinear programming.

首先，从庞德里亚金极大值原理出发，将有限推力作用下月球软着陆问题转化为数学上的两点边值问题；在考虑边界条件及横截条件的前提下，将该两点边值问题转化为针对共轭变量初值和末时刻的优化问题；然后应用非线性规划方法求解所形成的参数优化问题。

If you allowed the fly to pop upon landing and have a nice bass picked out, often times this all that is needed for the bucketmouth to inhale your offering.

如果你允许飞往着陆和流行过好低音抽出，很多时候，这一切都需要您的bucketmouth吸入招股。

In the system, B/S mode is adopted. With the popedom ,user can use the system by landing.

此系统采用B/S模式，系统的用户设计成分权限登陆并使用系统。

Not in the office of the computer pornography landing site.

不要在办公室的电脑里登陆色情网站。

Two days by myself on Lava lake chasing the elusive rainbow trout and landing a nice four pounder on my fly rod.

两天自己的熔岩湖追逐难以捉摸虹鳟鱼和着陆很好四磅我飞棒。

We understand that the automobile and home appliances market spending power take-off and landing of reason, may wish to take a look at the real estate market trends.

我们的理解是，汽车和家电市场消费能力起飞和着陆的原因，不妨看看房地产市场的发展趋势。

Regulating the use of force when farming should be placed in first position handle adjustment to enhance the location of tools to enhance the height adjustment lever is located by the position location of the upgrade, only the use of power tools adjustment handle take-off and landing.

整体式液压系统就是把液压系统中的动力部分、控制部分和工作部分等液压元件，都安装在一个壳体内，组成一个液压系统的整体。

When he had reached the upper landing an impulsive sidewise glance assured him, more clearly than before, of her uncommonly prepossessing appearance.

他走到了楼梯顶，禁不住又回过头来侧眼看了看，这才看清她那非常动人的面貌。

The pretzels explode out of the bag, several landing rows in front of him.

爆炸的椒盐脆饼的袋子，有几个降落排在他前面。

With the development of the oilfield, deviated wells, sidetracking wells and horizontal wells have more and more important function,whereas the particularity of casing programme limited the landing depth of sucker rod pump ,and affected the producibility of oil well seriously.

随着油田的开发，斜井、侧钻井、水平井等非直井在油田开发中起到越来越重要的作用，但由于井身结构的特殊性，限制了有杆泵的下入深度，严重影响了油井的生产能力，同时抽油井杆管偏磨，已成为非直井降低产量，增加作业成本、增加杆管成本的主要矛盾。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。